J/MNRAS/431/2111 BUDHIES I. redshifts and EW[OII] (Jaffe+, 2013)
BUDHIES I: characterizing the environments in and around two clusters at
z~=0.2.
Jaffe Y.L., Poggianti B.M., Verheijen M.A.W., Deshev B.Z., van Gorkom J.H.
<Mon. Not. R. Astron. Soc., 431, 2111-2125 (2013)>
=2013MNRAS.431.2111J 2013MNRAS.431.2111J
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Redshifts ;
Equivalent widths
Keywords: galaxies: clusters: general -
galaxies: clusters: individual: Abell 963 -
galaxies: clusters: individual: Abell 2192 - galaxies: evolution
Abstract:
We present the optical spectroscopy for the Blind Ultra Deep HI
Environmental Survey (BUDHIES). With the Westerbork Synthesis Radio
Telescope, BUDHIES has detected HI in over 150 galaxies in and around
two Abell clusters at z≃0.2. With the aim of characterizing the
environments of the Hi-detected galaxies, we obtained multifibre
spectroscopy with the William Herschel Telescope. In this paper, we
describe the spectroscopic observations, report redshifts and EW[OII]
measurements for ∼600 galaxies, and perform an environmental analysis.
In particular, we present cluster velocity dispersion measurements for
five clusters and groups in the BUDHIES volume, as well as a detailed
substructure analysis.
Description:
To design the spectroscopic observations, we made use of the B- and
R-band magnitudes, the astrometry, and the galaxy-star separation
from the INT (Isaac Newton Telescopes) photometry, as well as the HI
detection information and the available redshifts. Our selection and
prioritization criteria are summarized in the following.
The spectroscopic observations were made using the AutoFib2+WYFFOS
(AF2) wide-field, multifibre spectrograph mounted on the 4.2m William
Herschel Telescope (WHT) in La Palma.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablec1.dat 63 594 *Measured redshifts and [OII] equivalent widths
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Note on tablec1.dat: optical information for all the galaxies observed with
the 4.2m William Herschel Telescope (WHT) for which a redshift was obtained.
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Byte-by-byte Description of file: tablec1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Field Field (A963 or A2192)
7 A1 --- --- [I] (1)
8- 26 A19 --- ID Object identification (JHHMMSS.ss+DDMMSS.s) (1)
28- 32 F5.2 mag Rmag [15.5/20.9] INT R magnitude
34- 38 F5.2 mag Bmag [17.2/22.4] INT B magnitude
40- 45 F6.4 --- z [0.04/1.00] Redshift (2)
47- 48 I2 --- q_z [-2/1] Redshift quality (3)
50- 54 A5 --- Sp Type of spectra (4)
57- 63 F7.3 0.1nm W[OII] ?=- [OII]3727Å emission line equivalent width
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Note (1): Right ascension and declination of the INT photometry.
Note (2): All redshifts have an uncertainty of 0.0003.
Note (3): The redshift quality ranges from 1 to -2, only redshifts quality
≥-1 are to be trusted.
Note (4): Type of spectra as follows:
em = emission-line spectra
ab = absorption
em+ab = both types of features clearly visible
em/ab = there is significantly more emission than absorption
ab/em = there is significantly more absorption than emission
nan = galaxy spectra did not have clear features.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Jun-2014